LTC1470/LTC1471
ELECTRICAL CHARACTERISTICS
SYMBOL
t
0
to t
3
t
3
to t
5
t
0
to t
5
PARAMETER
Delay and Rise Time (Note 5)
Delay and Rise Time (Note 5)
Delay and Rise Time (Note 5)
3V
IN
= 3.3V, 5V
IN
= 5V (Note 2), T
A
= 25°C, unless otherwise noted.
MIN
0.2
0.2
0.2
TYP
0.32
0.52
0.38
MAX
1.0
1.0
1.0
UNITS
ms
ms
ms
CONDITIONS
Transition from 0V to 3.3V, R
OUT
= 100Ω, C
OUT
= 1µF
Transition from 3.3V to 5V, R
OUT
= 100Ω, C
OUT
= 1µF
Transition from 0V to 5V, R
OUT
= 100Ω, C
OUT
= 1µF
The
q
denotes the specifications which apply over the full operating
temperature range.
Note 1:
For the LTC1470, the two output pins (1, 8) must be connected
together and the two 3.3V supply input pins (6 , 7) must be connected
together. For the LTC1471, the two AOUT pins (1, 16) must be connected
together, the two BOUT pins (8, 9) must be connected together, the two
A3V
IN
supply input pins (14, 15) must be connected together, the two
B3V
IN
supply pins (6, 7) must be connected together and the two GND
pins (5, 13) must be connected together.
Note 2:
Power for the input logic and charge pump circuitry is derived
from the 5V
IN
supply pin(s) which must be continuously powered.
Note 3:
Measured current is per channel with the other channel
programmed off for the LTC1471.
Note 4:
The output is protected with foldback current limit which reduces
the short-circuit (0V) currents below peak permissible current levels at
higher output voltages.
Note 5:
To 90% of final value.
TYPICAL PERFORMANCE CHARACTERISTICS
3V
IN
Supply Current (OFF)
5
4
3
2
1
0
–1
0
T
A
= 25°C
PROGRAMMED TO OFF
120
100
80
60
40
20
0
4
1470/71 G04
3V
IN
SUPPLY CURRENT (µA)
3V
IN
SUPPLY CURRENT (µA)
5V
IN
SUPPLY CURRENT (µA)
3
1
2
3V
IN
SUPPLY VOLTAGE (V)
5V
IN
Supply Current (3.3V ON)
300
250
200
150
100
50
0
T
A
= 25°C
PROGRAMMED
TO 3.3V, NO LOAD
3.3V SWITCH RESISTANCE (Ω)
5V
IN
SUPPLY CURRENT (µA)
5V
IN
SUPPLY CURRENT (µA)
0
1
2
3
4
5
5V
IN
SUPPLY VOLTAGE (V)
U W
6
1470/71 G03
(LTC1470 or 1/2 LTC1471)
5V
IN
Supply Current (OFF)
5
4
3
2
1
0
–1
T
A
= 25°C
PROGRAMMED TO OFF
3V
IN
Supply Current (3.3V ON)
T
A
= 25°C
PROGRAMMED TO
3.3V, NO LOAD
0
3
1
2
3V
IN
SUPPLY VOLTAGE (V)
4
1470/71 G05
0
1
2
3
4
5
5V
IN
SUPPLY VOLTAGE (V)
6
1470/71 G01
5V
IN
Supply Current (5V ON)
300
250
200
150
100
50
0
T
A
= 25°C
PROGRAMMED
TO 5V, NO LOAD
0.30
0.25
0.20
0.15
0.10
0.05
0
3.3V Switch Resistance
PROGRAMMED
TO 3.3V
0
1
5
2
3
4
5V
IN
SUPPLY VOLTAGE (V)
6
0
25
50
75
100
JUNCTION TEMPERATURE (°C)
125
1470/71 G07
1470/71 G02
3
LINER [ LINEAR TECHNOLOGY ]
